Examining the Role of Social Isolation on Hospitalizations, Nursing Home Entry, and Mortality among Older Adults

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dc.contributor.advisorGimm, Gilbert
dc.creatorPomeroy, Julia Mary Louise
dc.date.accessioned2023-04-10T18:46:35Z
dc.date.issued2022
dc.description.abstractSocial isolation affects a quarter of older adults in the United States, complicating efforts for Americans who wish to age at home or in the community. Social isolation is a key risk factor for adverse health outcomes and high health care costs, and is expected to have increased during COVID-19 due to social distancing efforts. However, little research has examined the impact of social isolation on health care utilization. Literature in this area tends to be conducted internationally, uses short follow-up times, measures social isolation through single-item variables, and usually does not control for both social isolation and loneliness in the same sample. No prior studies have examined the association between social isolation and nursing home entry in a United States-based sample. This dissertation includes three studies that expand knowledge on the associations between social isolation and hospitalization, nursing home entry, and mortality in a nationally-representative sample of community-dwelling Americans ages 65 and older. Data from the Health and Retirement Study were used to construct a multi-domain measure of social isolation while controlling for loneliness. The first study uses a panel data analysis to examine whether social isolation was associated with overnight hospital stays, nursing home entry, and mortality among older adults tracked between 2006 and 2018. The second study uses a time-to-event analysis to examine whether social isolation is associated with earlier time to long-term nursing home placement (residency of 100+ days) and mortality over ten years. The third study provides an exploratory, cross-sectional analysis to examine whether use of senior services moderates the association between social isolation and nursing home entry among respondents interviewed between 2010 and 2012. Results demonstrate that social isolation is significantly associated with increased nursing home entry and early mortality. Research examining the association between social isolation and health care utilization has important implications for the expansion of home and community-based services under Medicaid and billing codes to cover screening, referral, and treatment under Medicare. Future research should evaluate whether initiatives that enhance social connections in home or community-based settings are effective in offsetting nursing home entry, reducing premature mortality, and curbing health care costs for patients and payers.
dc.description.embargo2024-08-31
dc.description.noteThis work is embargoed by the author and will not be publicly available until 2024-08-31.
dc.format.extent128 pages
dc.format.mediumdoctoral dissertations
dc.identifier.urihttps://hdl.handle.net/1920/13269
dc.language.isoen
dc.rightsCopyright 2022 Julia Mary Louise Pomeroy
dc.rights.urihttps://rightsstatements.org/vocab/InC/1.0
dc.subjectAging
dc.subjectHealth care utilization
dc.subjectLoneliness
dc.subjectMortality
dc.subjectSocial isolation
dc.subjectSocial support
dc.subject.keywordsAging
dc.subject.keywordsHealth sciences
dc.titleExamining the Role of Social Isolation on Hospitalizations, Nursing Home Entry, and Mortality among Older Adults
dc.typeText
thesis.degree.disciplineHealth Services Research
thesis.degree.grantorGeorge Mason University
thesis.degree.levelDoctoral
thesis.degree.namePh.D. in Health Services Research

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